Journal Article
                        
                        Betràn, Ana P, Mario  Merialdi, Jeremy A Lauer, Wang  Bing-Shun, Jane  Thomas, Paul  Van Look, and Marsden  Wagner.  
"Rates of caesarean section: analysis of global, regional and national estimates." Paediatric and Perinatal Epidemiology 21, no. 2 (2007): 98-113.